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Which is a winning combination of digits?

The computer chose a secret code (sequence of 4 digits from 1 to 6). Your goal is to find that code. Black circles indicate the number of hits on the right spot. White circles indicate the number of hits on the wrong spot.

Correct answers: 25

The first user who solved this task is Djordje Timotijevic.

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Robert Stephenson

Born 16 Oct 1803; died 12 Oct 1859 at age 55. Outstanding English Victorian civil engineer, (son of George Stephenson) and builder of many long-span railroad bridges, most notably the tubular Britannia Bridge over the Menai Strait, North Wales. After serving as as a mine supervisor in Colombia (1824-7) he managed Robert Stephenson and Company, manufacturers of locomotives, which was founded in 1823 by his father. Their first engine, the Lancashire Witch (1828) had inclined cylinders that were connected directly to crank pins on the wheels and was a direct predecessor to the famous Rocket (1829) which began the century of the steam locomotive. He built the world's first intercity passenger railway operated solely by steam locomotives (1830) between Liverpool and Manchester.

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